Two ways to check (fine guns btw). One. Have some one else shoot your gun. If they get no malfunctions for 3 or 4 mags, then it's you (but then you try until you get the error, etc). Make sure the other shooter is competent and wouldn't limp wrist either.
2) Purposely death grip the gun, hold it high up on the grip, and see if it happens.
Also, try different brands of ammo... always important to use good/decent ammo when trying to debug a gun.